Here is what the SEC considers material information it does not include or allude to any positive trial results. It may allude to negative trial results under material impairment.

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Material events that are reported to the U.S. Securities and Exchange Commission on Form 8-K
The comprehensive list of prescribed corporate events that are presumptively material and that must be disclosed, or will likely be required to be disclosed, with the U.S. SEC on Form 8-K is as follows:

• Changes in control of a company;
• A company’s acquisition or disposition of a significant amount of assets;
• A company’s bankruptcy or receivership;
• Changes in a company’s certifying accountant;
• Resignations of a company’s directors, circumstances for the departure of a director,
the appointment or departure of a principal officer, and the election of new directors other than pursuant to a vote of security holders at an annual meeting;
• Change in a company’s fiscal year and amendments to a company’s articles of
incorporation or bylaws that were not previously disclosed in a proxy statement or other such disclosure document;
• Entry into a material agreement not made in the ordinary course of business;
• Termination of a material agreement not made in the ordinary course of business;
• Termination or reduction of a business relationship with a customer that constitutes a specified amount of the company’s revenues;
• Creation of a direct or contingent financial obligation that is material to the company;
• Events triggering a direct or contingent financial obligation that is material to the company, including any default or acceleration of an obligation;
• Exit activities including material write-offs and restructuring charges;
• Any material impairment;
• A change in a rating agency decision, issuance of a credit watch or change in a company outlook;
• Movement of the company’s securities from one exchange or quotation system to another, delisting of the company’s securities from an exchange or quotation system,
or a notice that a company does not comply with a listing standard;
• Conclusion or notice that security holders no longer should rely on the company’s previously issued financial statements or a related audit report;
• Any material limitation, restriction or prohibition, including the beginning and end of lock-out periods, regarding the company’s employee benefits, retirement and stock ownership plan;
• Unregistered sales of equity securities by the company;
• Material modifications to rights of holders of the company’s securities;
• Earnings releases;
• Changes in earnings guidance; and
• Other materially different information regarding key financial or operations trends from that set forth in periodic reports.

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https://www.sec.gov/about/offices/oia/oia_cor...isclos.pdf